I just watched the movie "Throne of Blood" by Akira Kurosawa the film really highlights how treachery and ambition can ruin your life. In that movie the character was ambitious and he killed before he was killed and ultimately it led him to treachery, dishonesty, murder, and it was all done because of ambition and power. I really recommend the movie, it is a masterpiece which will scare you away from ambition and encourage you to be honest and thankful in humbleness.